Mobikwik — Complaining about the hp diwali offer which mobikwik has given

Address:

New Delhi, Delhi, 110070

Mobiwik has given the scheme of Rs.2100 that when you top-up the wallet with 350rs each month starting from Dec'15 and during this top-up you will get option of voucher code. Enter code ******* and you get cashback of 350rs so total amount in your wallet will be 700rs and i have got this scheme working till Jan but when i am doing the same thing on Feb and it is giving me error technical downtime please try it again later and they are not picking up the call when i am dialing there customer care number.

Please look into this and i want to resolve this ASAP.